import java.util.Scanner;

// 注意类名必须为 Main, 不要有任何 package xxx 信息
public class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        int num = in.nextInt();
        int ret = 0;
        int max = 0;
        while(num>0) {
            if((num&1) == 1) {
                ret++;
                max = Math.max(ret,max);
            }else {
                ret = 0;
            }
            num = num >> 1;
        }
        System.out.println(max);
    }
}